[Berg]

That's a tough one. I think if it is in fact a true 138 car with a matching numbers L78 375 hp big block and EVERYTHING is there and original I think it could be worth around $4,500 in my area. I'd go back and fully document every part of the car and get all the casting numbers and date codes on everything from the pulleys to the intake and carburetor, cylinder heads, block, etc... Also keep in mind that even though someone did the bodywork I know a lot of stuff that I find that was done in the 80's wasn't always done the best way with the best materials. Just because the bodywork was "completed" doesn't really mean it is truly done or done correctly. You may take it to a shop to get paint put on it and the guys there might tell you how much more work it needs. You could go from a $1500 paint job to a $5,000 straightening and rust repair with paint job real quick. Also keep in mind the car is only worth what you feel it is worth. From a financial point the cars aren't worth as much money right now as they were worth say 5 years ago. This also means you might have some room for negotiation although everyone likes to think their car is worth more. In the end, if it is the car you want, its worth what you can comfortably afford. I think it wouldn't hurt to haggle with the guy a little. Maybe you could use a lot of your clone parts on this one to keep costs down and get some money back from the sale or parting out of the car you are doing now.